[1] Tan Tock Seng Hosp, Dept Haematol, Singapore, Singapore
[2] Khoo Teck Puat Hosp, Dept Lab Med, Singapore, Singapore
[3] Tan Tock Seng Hosp, Dept Cardiol, Singapore, Singapore
[4] Tan Tock Seng Hosp, Dept Lab Med, Singapore, Singapore
[5] Tan Tock Seng Hosp, Dept Infect Dis, Singapore, Singapore
[6] Natl Ctr Infect Dis, Singapore, Singapore
[7] Tan Tock Seng Hosp, Dept Gen Surg, Singapore, Singapore
[8] Tan Tock Seng Hosp, Dept Anaesthesiol Intens Care & Pain Med, Singapore, Singapore
[9] Lee Kong Chian Sch Med, Singapore, Singapore
[10] Yong Loo Lin Sch Med, Singapore, Singapore